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The Iris Project

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The Iris Project

This server is all about the development and community around Iris Shaders!

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Distra Slice

5/8/2025

Bottom of my screen isn't loading the shaders correctly and I don't know why... any advice

Solution:

damian101

5/8/2025

Installer doesn't display correctly.

I'm on Arch Linux with KDE Plasma. Changing default Java version doesn't help. X11 currently, will try Wayland later. Any ideas why this could be?...

Hypixel

5/7/2025

Z-fighting with iron bars

Not sure if this is because of Iris, but either way: Info: iris-1.7.2+mc1.20.6.jar...

Solution:

Raihanshere

5/6/2025

shader menu gone

the k hotkey to activate shaders doesnt work either. the only way to activate is to go into the mods menu and iris from there

Chirparu♧

5/5/2025

Crash help.

I am once again with the Chisels and Bits mod(Fabric 1.20.1) trying to add shaders. I added all the need mods(from what I understand) and it didn't give me errors until it crashed. "The game crashed: initializing game Error: java.lang.RuntimeException: Mixin transformation of net.minecraft.class_761 failed"...

᲼

5/5/2025

45-55% FPS Reduction using 1.21.5 compared to 1.21.4

I originally opened this as a bug report on Github, but I'd figure I would also put it here just incase: https://github.com/IrisShaders/Iris/issues/2732 The TDLR though is, fps seems to be around 45-65% of where it used to be in 1.21.4 (performance varries from different specs it seems). This only occurs when a shader is enabled at all, even disabling it (with the hotkey in my case) causes my fps to be normal like how they are in 1.21.4, 3 other people in this thread is having the same issue, and it seems that (if they are to be believed), there are another 8 people having the same issue too that are just casual players. The difference this time (and I will update this in the bug report too later) is that the fabric1.8.12snapshot.jar does not solve this issue, I'm still getting the same FPS loss. This marks the affected versions now to 1.8.10-1.8.12snapshot for 1.21.5....

Chirparu♧

5/5/2025

Bit's and Chisels + Shaders

I built a 1.20.1 world using the Chisels and Bits mod + Axiom mod. I finished my build and wish to add a shaderpack to give a better lightning and better feel. I tried Complementary and Sildurs shaderpacks but each time the chiseled blocks turn invisible. I am using 1.20.1 Fabric, Iris, and Sodium. (Currently with Sildurs Shaderpack). I tried Iris Flywheel compat but that gave me a crash error. What else can I try?? Should I just continue without a shaderpack??

Nern

5/5/2025

Game crashes when joining a world. (1.21.5)

The game crashes whenever I load into a singleplayer world, or into a server, and still does even after reducing my modpack to 5 mods. Just wondering if this is a known bug or if there's a fix.

nick_ninj

5/4/2025

Won't let me use any of the shaders I tried

When I try to enable a shader I get this and when I click the copy info button from Iris error message my game just crashes and doesn't copy Im on 1.21.1 M4 Mac

DaFUKT

5/3/2025

Iris doesn't work for 1.21.4 Forge

Hello, I have installed Iris as Optifine would just straight up crash my game. Good news: Iris doesn't crash my game Bad news: It's like Iris doesn't exist in game... I have the file both in the mod folder AND the curseforge folder in their launcher. However it's not there when I launch the game. ...

Solution:

Forge has never and will never be supported. Use neoforge or fabric

FINDERFEED

5/3/2025

Night Vision is being ignored if current cameraEntity is not a player while shaderpack is active

Hi! I am developing a mod and i am changing (Minecraft.getInstance().)cameraEntity to my own entity in certain situations. The issue is that i need night vision to work but it just doesn't (with vanilla entities too (when you possess them in spectator mode)). Is there a fix for that, that i can forcefully turn on in code or where should i mixin to tell iris that scene should be rendered like i have night vision (i tried overriding hasEffect in my entity but no result)? Version 1.21.1 NeoForge...

Hypixel

5/3/2025

SEUS PTGI GFME won't load

Failed to get entry for 264

Solution:

Alright I’m back. Your Iris is quite outdated; please update it to 1.7.2 (also requires you to update Sodium to 0.5.11)

TTUDL

5/3/2025

Shader causing leather armor texture bug.

Without this shader: Normal Within this shader: 💀...

Eat Pray Mine

5/3/2025

Crash After Launch

I've been having some issues with Iris. I used to run Optifine and it worked fine, I wanted to switch to Iris cause I heard it was a little less resource heavy. I've attached the crash log, any help would be greatly appreciated. Thanks!...

crash_report.txt

Q_ZIN

5/2/2025

bliss shader

how do i make the bliss shader look like this? i’m korean and l don’t know much about shaders or mods

Hagström

5/1/2025

Crashing after a short but random amount of time in game (1.21.1, both DH and unmodded, NeoForge)

Hi! For the past three days I have been trying to get shaders to work on my admittedly old, but BG3-worthy computer. They (bliss and complementary shaders) function pretty well on a creative test world, even flying around quickly with an elytra, but on my main hardcore world the game always crashes pretty quickly, even just moving around. I made a new hardcore world, and there both shaders function until I start using a pickaxe, and then after mining between 0-6 blocks it crashes the game. How I can break blocks and jump around in creative but not in survival/hardcore (or look at chickens, if we consider my main world) is beyond my computer knowledge. It's also pretty finicky to get the shaders to load in the first place, but after some trial and error I can get Bliss to load on launch and Complementary to load by switching it on and off a few times, or changing any setting in it. Concerning drivers, I have made sure that they are updated to the latest version. My GPU is a 1650 Super, my CPU is a 16 year old Intel Xeon and my RAM is 12GB of (very) early DDR3, borderline DDR2. I realise this is very old, but it somehow runs Baldurs Gate 3 and Warhammer 3 just fine (albeit at a pretty crusty framerate), so I'd imagine it should be able to run some lower level shaders....

okok

5/1/2025

shader bug

Is this normal? (happening with all shaders) I use Minecraft Launcher 1.21.4 I don't know why when I press F3 it is fixed even though if I leave it it appears as I ordered in the photos, I don't know why it happens ...

Vulture

4/30/2025

Minecraft crashing

My minecraft was working perfectly before I added iris mod. I used curseforge app to add the mod to my modpack. When I added it and tried to open minecraft, it crashed immediately after being on the loading screen for 1 second. Also attaching the crash report for you to look at

Solution:

after some digging, I found out that my iris and sodium versions were mismatched so I updated my sodium and now it works

O7a5Nfy.txt

nebula

4/29/2025

annoying/wacky fps with REI

https://spark.lucko.me/FWQav2hRdt https://streamable.com/eguw60 Whenever I have the gui of REI up the fps of my game goes really realy low without actually affecting the count, the only noticeable change i see is GPU usage. this is also noticeable without shaders, going from 5-15%, instantly to 35+ but no real FPS issues. There is a possible mod compatibility issue but im genuinely not sure what it could be, I tested my fps using only REI, sodium, dynamic fps, (and dependencies) and the issue was not there (at least i dont think i noticed it, maybe didnt test it enough.) Another weird thing is that when my game isnt focused (and i have dynamic fps turned off) the fps of my game is normal. Another thing, when on lower tiers of shaders (ex: potato complementary unbound) the problem is not as noticeable but still a big gpu usage bump. Not sure what else to add, if i need to provide more information, let me know....

Solution:

well i found out what the issue was, it is with a mod called Immediately Fast, my only solution being removing it since there's no config.

hums

4/29/2025

Crash on world load

https://github.com/IrisShaders/Iris/issues/2730 heres the github post i made on the Iris Issue Forum, ill ask here aswell so i can get the fix quicker, please help my issue.

Solution:

that version of better clouds is ancient. Try updating to 1.3.21

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The Iris Project

This server is all about the development and community around Iris Shaders!

The Iris Project

This server is all about the development and community around Iris Shaders!